APIs · head to head
Basis Theory vs Zelle
Basis Theory
APIs
Developer tokenisation platform that holds card and sensitive data inside a PCI Level 1 environment you do not operate
- From
- $995/month
- Rated
- -
The short version
- Only Zelle has a free tier, so it costs nothing to try first.
- Each has a real cost: Basis Theory the Starter plan is 995 US dollars a month before any volume, which is a real floor for an early stage company and puts the product out of reach of teams tokenising a few thousand records.; Zelle both sender and recipient must have US bank accounts, so it does not work for international transfers
- They diverge on capability: Basis Theory covers Tokenisation API, Zelle covers Instant money transfers.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Basis Theory and Zelle actually diverge.
| Attribute | Basis Theory | Zelle |
|---|---|---|
| Starting price | $995/month | Free |
| Pricing model | Per month by token volume | free |
| Free tier | No | Yes |
| Platforms | Web, iOS, Android, Linux | Web, IOS, Android |
| Category | APIs | Personal Finance |
| Founded | Unknown | 2017 |
Identical on both: user rating (Not yet rated).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Basis Theory
- Tokenisation API
- Hosted elements
- Outbound proxy
- PCI attestation of compliance
- Processor portability
- Reactors
- Access controls and audit
- PII and PHI options
Only in Zelle
- Instant money transfers
- Bank-to-bank transfers
- Recipient validation
- Transaction history
- Bank accounts
- Web support
- IOS support
- Android support
What people use each for
The jobs each tool is most often brought in to do.
Basis Theory
- A payments company that wants card on file without bringing its own infrastructure into PCI scope and paying for the assessment that followsnot Zelle
- A merchant locked into a processor by that processor vault that wants to hold its own tokens and route to more than one acquirernot Zelle
- A fintech collecting bank account and identity data that needs it isolated from its application database before an enterprise security reviewnot Zelle
- A team that needs to send stored card data to a third party for a one-off integration without that data traversing its own serversnot Zelle
Zelle
- Sending money between US bank accounts within minutesnot Basis Theory
- Paying individuals directly from a bank's own mobile appnot Basis Theory
- Accepting customer payments through a Zelle small business accountnot Basis Theory
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Basis Theory
- The Starter plan is 995 US dollars a month before any volume, which is a real floor for an early stage company and puts the product out of reach of teams tokenising a few thousand records.
- Starter is limited to the US region, so a company with European data residency requirements is pushed into a quoted Scale or Enterprise agreement immediately.
- Log retention on Starter is 24 hours, which is well below what most security teams expect for a system holding cardholder data and forces an upgrade for reasons unrelated to volume.
- Migrating away means moving card data out of the vault, which requires processor and assessor involvement and is slow, so the portability argument that attracts buyers cuts against them at exit.
- An attestation of compliance covers the vendor environment, not your assessment; your assessor still decides what is in scope, and buyers occasionally discover their integration pattern pulled systems back into scope anyway.
Zelle
- Both sender and recipient must have US bank accounts, so it does not work for international transfers
- Payments cannot be reversed once the recipient is enrolled, and a payment can only be cancelled while the recipient has not yet enrolled
- Send limits are set by each participating financial institution rather than published by Zelle
- Reimbursement is limited to qualifying imposter scams rather than a general purchase protection
- Business use requires a separate small business account
Pricing, plan by plan
Basis Theory
$995/month- Starter$995/month
- 20,000 tokens included
- Production PCI Level 1 environment
- US region only
- Scale$undefined/month
- Quoted
- Higher token volumes
- Additional regions
- Enterprise$undefined/month
- Quoted
- Additional compliance options for PII and PHI
- Responses for 95 percent of PCI SAQ D
Zelle
Free- FreeFree
- Instant transfers
- Bank security
- Mobile app
Which should you pick?
Choose Basis Theory if
- You need tokenisation api.
- You work on Web, iOS, Android, Linux.
- You also want hosted elements.
Choose Zelle if
- You need instant money transfers.
- You want to start without paying.
- You work on Web, IOS, Android.
- You also want bank-to-bank transfers.
Questions people ask
- Is Basis Theory or Zelle better?
- Neither clearly leads. Basis Theory starts at $995/month and Zelle at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Basis Theory or Zelle?
- Zelle has a free tier; the other does not. Paid plans start at $995/month for Basis Theory and Free for Zelle.
- Does Basis Theory or Zelle run on more platforms?
- Basis Theory runs on Web, iOS, Android, Linux. Zelle runs on Web, IOS, Android.
- Can I use Zelle for free?
- Yes. Zelle has a free tier, so you can try it without paying. Basis Theory starts at $995/month.
- What is Basis Theory best used for?
- Basis Theory is most often used for a payments company that wants card on file without bringing its own infrastructure into pci scope and paying for the assessment that follows, a merchant locked into a processor by that processor vault that wants to hold its own tokens and route to more than one acquirer, a fintech collecting bank account and identity data that needs it isolated from its application database before an enterprise security review, a team that needs to send stored card data to a third party for a one-off integration without that data traversing its own servers. Of those, a payments company that wants card on file without bringing its own infrastructure into pci scope and paying for the assessment that follows and a merchant locked into a processor by that processor vault that wants to hold its own tokens and route to more than one acquirer are not what Zelle is typically brought in for.
- What can Basis Theory do that Zelle cannot?
- Basis Theory covers Tokenisation API, Hosted elements, Outbound proxy, PCI attestation of compliance. Zelle covers Instant money transfers, Bank-to-bank transfers, Recipient validation, Transaction history.
Answered from the vendors’ own pages
Basis Theory: Does this make us PCI compliant?
It removes cardholder data from your systems and gives you an AOC plus documented responses for most of a SAQ D. Your assessor still determines your scope, and a careless integration can pull systems back in.
Zelle: Does Zelle charge fees?
99.40% of consumer savings and checking accounts linked to Zelle do not charge a fee to send, receive, or request money. Check with your specific financial institution as fees may vary.
SourceBasis Theory: What does it cost to start?
995 US dollars a month on Starter, including 20,000 tokens, a production PCI Level 1 environment and US hosting. Higher tiers are quoted.
Zelle: How long do transactions take?
Transactions sent to enrolled users typically occur within minutes, though it's recommended to verify timing with your financial institution.
SourceBasis Theory: Can we switch payment processors without re-collecting cards?
Yes, that is the main non-compliance reason to buy it. You hold the tokens and detokenise into whichever processor you route to.
Zelle: What type of account do I need?
Both parties must have an eligible checking or savings account to send or receive money through Zelle.
SourceBasis Theory: Is data stored outside the United States?
Not on Starter, which is US only. Other regions require a Scale or Enterprise agreement.
Zelle: Does Zelle sell my data?
Zelle does not sell data. However, data is shared for cross context behavioral advertising.
SourceRelated pages
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